LNNano - Brazilian Nanotechnology National Laboratory

Functional Devices and Systems

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Functional Devices and Systems

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Responsible: Dr. Carlos Cesar Bof Bufon

Address: Rua Giuseppe Máximo Scolfaro, 10000, Campinas – SP – CEP 13083-100, Brazil Tel.: +55 19 3512 1166

 

 

The Laboratory for Functional Devices and Systems (Laboratório de Dispositivos e Sistemas Funcionais – DSF) is an open user facility part of the Brazilian Nanotechnology National Laboratory (LNNano).  The DSF provides technical and scientific support on fabrication and characterization of complexes devices. The laboratory includes a cleanroom facility for microfabrication as well as several measurement setups for electrical characterization.

Proposals to use the infrastructure can be submitted over the user portal.

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Most recent highlights:

A simple capacitive method to evaluate ethanol fuel samples

Ethanol is a biofuel used worldwide. However, the presence of excessive water either during the distillation process or by fraudulent adulteration is a major concern in the use of ethanol fuel. High water levels may cause engine malfunction, in addition to being considered illegal. Here, we describe the development of a simple, fast and accurate platform based on nanostructured sensors to evaluate ethanol samples. The device fabrication is facile, based on standard microfabrication and thin-film deposition methods. The sensor operation relies on capacitance measurements employing a parallel plate capacitor containing a conformational aluminum oxide (Al2O3) thin layer (15 nm). The sensor operates over the full range water concentration, i.e., from approximately 0% to 100% vol. of water in ethanol, with water traces being detectable down to 0.5% vol. These characteristics make the proposed device unique with respect to other platforms. Finally, the good agreement between the sensor response and analyses performed by gas chromatography of ethanol biofuel endorses the accuracy of the proposed method. Due to the full operation range, the reported sensor has the technological potential for use as a point-of-care analytical tool at gas stations or in the chemical, pharmaceutical, and beverage industries, to mention a few.

Scientific Reports | 7:43432 | DOI: 10.1038/srep43432

Direct Linkhttp://rdcu.be/pDV4

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Nova plataforma de sensoriamento permite detectar biomolécula relacionada às doenças neurodegenerativas em concentrações de picomolares

 

Biosensors

 

Pesquisadores do grupo de Dispositivos e Sistemas Funcionais (DSF), do Laboratório Nacional de Nanotecnologia (LNNano), desenvolveram um sensor capaz de detectar a enzima Glutationa S-transferase (GST) em concentrações de picomolares (200 pmol.L-1). Tal concentração é a mais baixa reportada na literatura até então para biossensores do tipo label-free, isto é, que não requerem compostos adicionais para a geração de resposta do sensor. Recentemente, pesquisadores do DSF/LNNano mostraram ser capazes de detectar tal enzima com um dispositivo do tipo transistor (doi:10.1016/j.orgel.2016.01.041), porém, limitado a uma única concentração e 10 vezes maior que esta (200 nmol.L-1).

A nova plataforma de detecção de GST consiste em um dispositivo híbrido onde eletrodos metálicos são recobertos com uma camada nanométrica de óxido de alumínio. A superfície do dispositivo é então funcionalizada com moléculas orgânicas contendo o peptídeo glutationa reduzida, que se liga de maneira específica a enzima-alvo. A natureza híbrida do dispositivo, aliada a funcionalização peculiar deste, permite o monitoramento de GST em uma larga faixa de operação (200 pmol.L-1 a 2 mmol.L-1), a mais ampla já reportada. A enzima GST é uma importante biomolécula associada a doenças neurodegenerativas como Alzheimer e Parkinson e alguns tipos de câncer. O trabalho, intitulado Hybrid organic/inorganic interfaces as reversible label-free platform for direct monitoring of biochemical interactions, foi publicado no jornal Biosensors & Biolectronics (doi:10.1016/j.bios.2016.08.050) e é de autoria de Tatiana P. Vello, Larissa M. B. da Silva, Gustavo O. Silva, Davi H.S. de Camargo e Cátia C. Corrêa, sob coordenação de Carlos César Bof Bufon. Segundo os pesquisadores, além de ser um sistema simples e reversível, o sensor poderá ser aplicado futuramente para análises em amostras reais. A plataforma também possui a vantagem de ser adaptada para detecção de outras biomoléculas de interesse.

A pesquisa foi financiada pelas agências de fomento CAPES, CNPq e FAPESP (Projetos 2013/22127-2 e 2014/25979-2). O grupo DSF trabalha no desenvolvimento de dispositivos eletrônicos híbridos nanoestruturados, nanomembranas enroladas e dispositivos baseados em papel, para sensoriamento físico, químico e biológico, em áreas que abrangem setores como meio-ambiente, energia e saúde.

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Biossensor desenvolvido no DSF/LNNano é destaque em veículos de comunicação no Brasil e no exterior.

Divulgação site DSF

Mais detalhes: Divulgação Biossensor GSH-GST

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Vagas abertas para programas de mestrado e doutorado

Flyer Nanomembranas_CCBB

Fabricação, Caracterização e Aplicação de Dispositivos baseados em Nanomembranas

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Investigation about the electrical properties of organic semiconductors is awarded during the XIV Brazilian MRS Meeting

 

Capa_DSF

 

Organic molecules have been extensively used to achieve novel properties and improved performance in several electronic devices. In this sense, low cost biosensing platforms and organic light-emitting diodes (OLEDs) for display technologies, for example, have become increasingly present in the daily life. In this rich field, the PhD student Leandro Merces, from the Institute of Physics Gleb Wataghin (Unicamp)/Brazilian Nanotechnology National Laboratory (LNNano), seeks to understand the electrical properties of organic semiconductors (OSCs) using a nanometric hybrid heterojunction, to consolidate a solid path for novel applications. At the nanoscale, the OSC is connected by metal nanomembranes, forming an ultra-thin device, which electrical properties are investigated varying different parameters, such as temperature, electric field, or even the electrode configuration. The initial stage of such study focuses on the characterization of copper phthalocyanine (CuPc) thin-films, an OSC widely studied by the scientific community. Its high chemical stability and ease of processing make this compound a very suitable OSC for applications in electronics, spintronics and photonics. The first results are still in progress, but they have been already awarded as the best poster by the International Union of Materials Research Societies (IUMRS), during the XIV Meeting of the Brazilian Materials Research Society, held at Rio de Janeiro from September 27th to October 1st, 2015. The work, entitled “Fabrication and characterization of molecular junctions CuPc: investigation of the contact configuration“, competed with at least three thousands of works in the materials research area.

IUMRS AWARDhttp://sbpmat.org.br/see-the-list-of-the-35-winners-of-the-4-awards-of-the-xiv-sbpmat-meeting/

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